Modelovanje toplotno-mehaničkog ponašanja visokobrzinskog motor-vretena mašina alatki

Abstract

Na osnovu potreba razvoja i istraživanja visokobrzinskih motor-vretena, može se zaključiti da je neophodan kompleksan pristup ovom sklopu kao složenom mehaničkom sistemu, koji direktno utiče na ponašanje mašine alatke u eksploataciji. Kompleksan pristup treba da omogući da se toplotno-mehaničko ponašanje mašina alatki predvidi još u fazi projektovanja. Kako su glavna vretena sa visokobrzinskim kotrljajnim ležištima još uvek najzastupljenija konstrukciona rešenja, to je pred ovaj rad postavljen zadatak da se motor-vreteno, analizira sa stanovišta toplotno-mehaničkog ponašanja, te da se kreira kompleksan toplotno-mehanički model sklopa motor-vretena. Na primeru sklopa visokobrzinskog motor-vretena, uležištenog kugličnim ležajima sa kosim dodirom, želi se eksperimentalnim ispitivanjem proveriti definisani model za identifikaciju toplotno-mehaničkog ponašanja i analizirati uticaj temperature na njegove statičke i dinamičke karakteristike. Takođe se kroz rad analiziraju uticaji različitih fluida za hlađenje motor-vretena, kao i uticaj količine protoka fluida kako za hlađenje statora, tako i za hlađenje i podmazivanje ležaja. Polazeći od ovako definisanog globalnog zadatka, istraživanja u radu su izložena u okviru devet poglavlja.

Based on the needs of development and research of high-speed motor-spindles, it can be concluded that a complex approach to this assembly is necessary as a complex mechanical system, which directly affects the behavior of the machine tool in exploitation. A complex approach should enable the thermal-mechanical behavior of machine tools to be predicted at the design stage. As the main spindles with high-speed rolling bearings are still the most represented construction solutions, the task of this work is to analyze the motor-spindle from the point of view of thermal-mechanical behavior, and to create a complex thermal-mechanical model of the motor-spindle assembly. On the example of a high-speed motor-spindle assembly, supported by ball bearings with oblique contact, it is desired to verify the defined model for the identification of thermal-mechanical behavior and analyze the influence of temperature on its static and dynamic characteristics through experimental testing. The work also analyzes the influence of different fluids for cooling the motor-spindle, as well as the influence of the amount of fluid flow both for cooling the stator and for cooling and lubricating the bearings. Starting from the global task defined in this way, the research in the paper is presented in nine chapters.